UKLintels Internal Box Lintel - 140mm - 1050mm
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B&Q - Uklintels Internal 140mm Wide Box (Standard)1050mm Length
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HomebaseUklintels 140Mm Galvanised Steel Standard Internal Box Lintel 1050Mm
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Product Information
Full details
The UKLintels Internal Box Lintel (140mm x 1050mm) is designed for professional builders and DIY enthusiasts who need a reliable, lightweight solution for internal wall openings. Its primary benefit is the built-in plaster key, which significantly simplifies the finishing process while providing robust structural support for loads like timber joists or concrete floors; however, it is strictly intended for internal use and should not be exposed to the elements without appropriate protective measures.
All features
| Model Part Number | Uklintels |
|---|---|
| Brand | B&Q |
Extended Product Information
FAQs
Can I use this lintel for external walls?
No, this product is specifically designed for internal use. External walls require lintels with higher corrosion protection and thermal bridging considerations.
What is the minimum end bearing required?
A minimum of 150mm end bearing on each side is required for proper load distribution.
Does this lintel require a specific type of mortar?
It should be bedded on a standard load-bearing mortar mix as specified by your structural engineer or building project requirements.
Can I cut this lintel to a shorter length?
Modifying the length is generally discouraged as it can affect the structural rating; always use the correct length for your opening size.
Is the plaster key compatible with all plaster types?
Yes, it is designed to be compatible with most standard gypsum-based internal plasters used in modern construction.
Troubleshooting
Lintel appears slightly bowed after installation
Ensure the masonry below is perfectly level and that the mortar bed is uniform; check that the span does not exceed the manufacturer's recommended load limits.
Plaster failing to bond to the lintel surface
Verify that the lintel surface is clean, free of oil or dust, and that the mortar/plaster mix is of the correct consistency for application over steel.
Pros and Cons
Pros
- Excellent strength-to-weight ratio
- Simplifies plastering with built-in key
- Galvanised finish prevents early rust
- Versatile support for multiple material types
Cons
- Not suitable for external cavity wall use
- Requires professional alignment during installation
- Must be handled with caution to avoid edge deformation
Setup, Compatibility & Care
To ensure proper structural performance, the lintel must be bedded on a full mortar bed and have a minimum end bearing of 150mm on each side. Always ensure the lintel is level and centered across the opening. Because it is made of galvanised steel, it is naturally resistant to corrosion, but installers should avoid cutting the lintel with heat-generating tools where possible to maintain the protective coating. If the coating is scratched during transport, apply a cold-galvanising paint to the area to prevent surface oxidation. Keep the unit dry and off the ground before installation to ensure the plaster key remains free of debris.